Nik Wallenda's greatest tightrope walks

June 23, 2013

Frank Gunn/ASSOCIATED PRESS

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In this June 15, 2012 file photo, Nik Wallenda walks over Niagara Falls on a tightrope in Niagara Falls, Ontario. Wallenda finished his attempt to become the first person to walk on a tightrope 1,800 feet across the mist-fogged brink of roaring Niagara Falls. The seventh-generation member of the famed Flying Wallendas had long dreamed of pulling off the stunt, never before attempted.

Frank Gunn/ASSOCIATED PRESS

7of20

In this June 15, 2012 file photo, Nik Wallenda walks over Niagara Falls on a tightrope in Niagara Falls, Ontario. Wallenda finished his attempt to become the first person to walk on a tightrope 1,800 feet across the mist-fogged brink of roaring Niagara Falls. The seventh-generation member of the famed Flying Wallendas had long dreamed of pulling off the stunt, never before attempted.